ZyXEL Communications NBG420N User Manual
NBG420N
Wireless N Router
User’s Guide
Version 3.60
3/2008
Edition 1
DEFAULT LOGIN
IP Address http://192.168.1.1
Password 1234
www.zyxel.com
About This User's Guide
About This User's Guide
Intended Audience
This manual is intended for people who want to configure the NBG420N using the web
configurator. You should have at least a basic knowledge of TCP/IP networking concepts and
topology.
Related Documentation
• Quick Start Guide
The Quick Start Guide is designed to help you get up and running right away. It contains
information on setting up your network and configuring for Internet access.
• Supporting Disk
Refer to the included CD for support documents.
• ZyXEL Web Site
Please refer to www.zyxel.com
certifications.
for additional support documentation and product
User Guide Feedback
Help us help you. Send all User Guide-related comments, questions or suggestions for
improvement to the following address, or use e-mail instead. Thank you!
The Technical Writing Team,
ZyXEL Communications Corp.,
6 Innovation Road II,
Science-Based Industrial Park,
Hsinchu, 300, Taiwan.
E-mail: techwriters@zyxel.com.tw
NBG420N User’s Guide
3
Document Conventions
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
1 Warnings tell you about things that could harm you or your device.
" Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The NBG420N may be referred to as the “NBG420N”, the “device”, the “product” or the
“system” in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example, [ENTER]
means the “enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the [ENTER] key.
“Select” or “choose” means for you to use one of the predefined choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For example,
Maintenance > Log > Log Setting means you first click Maintenance in the navigation
panel, then the Log sub menu and finally the Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value. For
example, “k” for kilo may denote “1000” or “1024”, “M” for mega may denote “1000000”
or “1048576” and so on.
• “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other words”.
4
NBG420N User’s Guide
Document Conventions
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The NBG420N icon is not
an exact representation of your device.
NBG420N Computer Notebook computer
Server DSLAM Firewall
Telephone Switch Router
Modem
NBG420N User’s Guide
5
Safety Warnings
Safety Warnings
1 For your safety, be sure to read and follow all warning notices and instructions.
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device.
• Connect the power adaptor or cord to the right supply voltage (for example, 110V AC in
North America or 230V AC in Europe).
• Do NOT allow anything to rest on the power adaptor or cord and do NOT place the
product where anyone can walk on the power adaptor or cord.
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the power outlet.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Do not use the device outside, and make sure all the connections are indoors. There is a
remote risk of electric shock from lightning.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your
device.
• Antenna Warning! This device meets ETSI and FCC certification requirements when
using the included antenna(s). Only use the included antenna(s).
• If you wall mount your device, make sure that no electrical lines, gas or water pipes will
be damaged.
6
This product is recyclable. Dispose of it properly.
NBG420N User’s Guide
Safety Warnings
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Safety Warnings
8
NBG420N User’s Guide
Contents Overview
Contents Overview
Introduction ............................................................................................................................29
Getting to Know Your NBG420N ............................................................................................... 31
The WPS Button ........................................................................................................................ 35
Introducing the Web Configurator .............................................................................................. 37
Connection Wizard .................................................................................................................... 49
AP Mode .................................................................................................................................... 65
Tutorials ..................................................................................................................................... 73
Network ...................................................................................................................................87
Wireless LAN ............................................................................................................................. 89
WAN .........................................................................................................................................117
LAN .......................................................................................................................................... 127
DHCP ...................................................................................................................................... 133
Network Address Translation (NAT) ........................................................................................ 137
Dynamic DNS .......................................................................................................................... 147
Security .................................................................................................................................151
Firewall .................................................................................................................................... 153
Content Filtering ...................................................................................................................... 161
IPSec VPN ............................................................................................................................... 165
Management .........................................................................................................................193
Static Route Screens ............................................................................................................... 195
Bandwidth Management .......................................................................................................... 199
Remote Management ..............................................................................................................209
Universal Plug-and-Play (UPnP) ............................................................................................. 215
Maintenance and Troubleshooting .....................................................................................227
System ..................................................................................................................................... 229
Logs ......................................................................................................................................... 233
Tools ........................................................................................................................................ 251
Configuration Mode ................................................................................................................. 257
Sys Op Mode ........................................................................................................................... 259
Language ................................................................................................................................. 263
Troubleshooting ....................................................................................................................... 265
Appendices and Index ......................................................................................................... 271
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Contents Overview
10
NBG420N User’s Guide
Table of Contents
Table of Contents
About This User's Guide ..........................................................................................................3
Document Conventions............................................................................................................4
Safety Warnings........................................................................................................................6
Contents Overview ...................................................................................................................9
Table of Contents....................................................................................................................11
List of Figures .........................................................................................................................19
List of Tables...........................................................................................................................25
Part I: Introduction................................................................................. 29
Chapter 1
Getting to Know Your NBG420N............................................................................................31
1.1 Overview .............................................................................................................................. 31
1.2 Router Mode ........................................................................................................................ 31
1.3 AP Mode .............................................................................................................................. 32
1.4 Router Features vs. AP Features ........................................................................................ 32
1.5 Ways to Manage the NBG420N .......................................................................................... 33
1.6 Good Habits for Managing the NBG420N ........................................................................... 33
1.7 LEDs .................................................................................................................................... 33
Chapter 2
The WPS Button......................................................................................................................35
2.1 Overview .............................................................................................................................. 35
Chapter 3
Introducing the Web Configurator ........................................................................................37
3.1 Web Configurator Overview ................................................................................................. 37
3.2 Accessing the Web Configurator ......................................................................................... 37
3.3 Resetting the NBG420N ......................................................................................................39
3.3.1 Procedure to Use the Reset Button ........................................................................... 39
3.4 Navigating the Web Configurator ...................................................................................... 39
3.5 The Status Screen in Router Mode ..................................................................................... 39
3.5.1 Navigation Panel ........................................................................................................ 42
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Table of Contents
3.5.2 Summary: Any IP Table .............................................................................................. 44
3.5.3 Summary: Bandwidth Management Monitor ........................................................... 44
3.5.4 Summary: DHCP Table ........................................................................................... 45
3.5.5 Summary: Packet Statistics ..................................................................................... 46
3.5.6 Summary: VPN Monitor ............................................................................................. 47
3.5.7 Summary: Wireless Station Status ......................................................................... 47
Chapter 4
Connection Wizard .................................................................................................................49
4.1 Wizard Setup ....................................................................................................................... 49
4.2 Connection Wizard: STEP 1: System Information ............................................................... 50
4.2.1 System Name ............................................................................................................. 50
4.2.2 Domain Name ............................................................................................................ 51
4.3 Connection Wizard: STEP 2: Wireless LAN ........................................................................ 51
4.3.1 Basic (WEP) Security ................................................................................................. 53
4.3.2 Extend (WPA-PSK or WPA2-PSK) Security ............................................................... 54
4.4 Connection Wizard: STEP 3: Internet Configuration ........................................................... 54
4.4.1 Ethernet Connection .................................................................................................. 55
4.4.2 PPPoE Connection .................................................................................................... 55
4.4.3 PPTP Connection ....................................................................................................... 56
4.4.4 Your IP Address ......................................................................................................... 58
4.4.5 WAN IP Address Assignment ..................................................................................... 58
4.4.6 IP Address and Subnet Mask ..................................................................................... 59
4.4.7 DNS Server Address Assignment .............................................................................. 59
4.4.8 WAN IP and DNS Server Address Assignment ......................................................... 60
4.4.9 WAN MAC Address .................................................................................................... 61
4.5 Connection Wizard: STEP 4: Bandwidth management ....................................................... 62
4.6 Connection Wizard Complete .............................................................................................. 62
Chapter 5
AP Mode...................................................................................................................................65
5.1 AP Mode Overview .............................................................................................................. 65
5.2 Setting your NBG420N to AP Mode .................................................................................... 65
5.3 The Status Screen in AP Mode ........................................................................................... 66
5.3.1 Navigation Panel ........................................................................................................ 68
5.4 Configuring Your Settings .................................................................................................... 69
5.4.1 LAN Settings .............................................................................................................. 69
5.4.2 WLAN and Maintenance Settings .............................................................................. 71
5.5 Logging in to the Web Configurator in AP Mode ................................................................. 71
Chapter 6
Tutorials ................................................................................................................................... 73
6.1 Wireless Tutorials ................................................................................................................ 73
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Table of Contents
6.1.1 How to Connect to the Internet from an AP ............................................................... 73
6.1.2 Configure Wireless Security Using WPS on both your NBG420N and Wireless Client 73
6.1.3 Enable and Configure Wireless Security without WPS on your NBG420N ................ 76
6.1.4 Configure Your Notebook ........................................................................................... 78
6.2 Site-To-Site VPN Tunnel Tutorial ......................................................................................... 80
6.2.1 Configuring Bob’s NBG420N VPN Settings ............................................................... 81
6.2.2 Configuring Jack’s NBG420N VPN Settings .............................................................. 83
6.2.3 Checking the VPN Connection ................................................................................... 84
Part II: Network....................................................................................... 87
Chapter 7
Wireless LAN...........................................................................................................................89
7.1 Wireless Network Overview ................................................................................................. 89
7.2 Wireless Security Overview .................................................................................................90
7.2.1 SSID ........................................................................................................................... 90
7.2.2 MAC Address Filter .................................................................................................... 90
7.2.3 User Authentication .................................................................................................... 90
7.2.4 Encryption .................................................................................................................. 91
7.3 Roaming .............................................................................................................................. 92
7.3.1 Requirements for Roaming ........................................................................................ 93
7.4 Quality of Service ................................................................................................................ 93
7.4.1 WMM QoS ..................................................................................................................94
7.5 General Wireless LAN Screen ............................................................................................ 94
7.5.1 No Security ................................................................................................................. 96
7.5.2 WEP Encryption ......................................................................................................... 96
7.5.3 WPA-PSK/WPA2-PSK ................................................................................................ 98
7.5.4 WPA/WPA2 ................................................................................................................ 99
7.6 MAC Filter .......................................................................................................................... 101
7.7 Wireless LAN Advanced Screen ....................................................................................... 102
7.8 Quality of Service (QoS) Screen ....................................................................................... 103
7.8.1 Application Priority Configuration ............................................................................. 105
7.9 WiFi Protected Setup ......................................................................................................... 106
7.9.1 WPS Screen ............................................................................................................. 106
7.9.2 WPS Station Screen ................................................................................................. 107
7.9.3 Scheduling ...............................................................................................................107
7.10 iPod Touch Web Configurator .......................................................................................... 108
7.10.1 Login Screen .......................................................................................................... 109
7.10.2 System Status .........................................................................................................110
7.10.3 WPS in Progress .....................................................................................................112
7.10.4 Port Forwarding .......................................................................................................113
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Table of Contents
7.11 Accessing the iPod Touch Web Configurator ....................................................................114
7.11.1 Accessing the iPod Touch Web Configurator ..........................................................115
Chapter 8
WAN........................................................................................................................................ 117
8.1 WAN Overview ...................................................................................................................117
8.2 WAN MAC Address ............................................................................................................117
8.3 Multicast .............................................................................................................................117
8.4 Internet Connection ............................................................................................................118
8.4.1 Ethernet Encapsulation .............................................................................................118
8.4.2 PPPoE Encapsulation ...............................................................................................119
8.4.3 PPTP Encapsulation ................................................................................................ 122
8.5 Advanced WAN Screen ..................................................................................................... 125
Chapter 9
LAN.........................................................................................................................................127
9.1 LAN Overview .................................................................................................................... 127
9.1.1 IP Pool Setup ........................................................................................................... 127
9.1.2 System DNS Servers ............................................................................................... 127
9.2 LAN TCP/IP ....................................................................................................................... 127
9.2.1 Factory LAN Defaults ............................................................................................... 127
9.2.2 IP Address and Subnet Mask ................................................................................... 128
9.2.3 Multicast ................................................................................................................... 128
9.2.4 Any IP ....................................................................................................................... 128
9.3 LAN IP Screen ................................................................................................................... 130
9.4 LAN IP Alias ..................................................................................................................... 130
9.5 Advanced LAN Screen ...................................................................................................... 131
Chapter 10
DHCP......................................................................................................................................133
10.1 DHCP .............................................................................................................................. 133
10.2 DHCP General Screen .................................................................................................... 133
10.3 DHCP Advanced Screen .............................................................................................. 134
10.4 Client List Screen ............................................................................................................ 135
Chapter 11
Network Address Translation (NAT)....................................................................................137
11.1 NAT Overview ............................................................................................................... 137
11.2 Using NAT ........................................................................................................................ 137
11.2.1 Port Forwarding: Services and Port Numbers ........................................................ 137
11.2.2 Configuring Servers Behind Port Forwarding Example .......................................... 138
11.3 General NAT Screen ........................................................................................................138
11.4 NAT Application Screen ................................................................................................. 139
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Table of Contents
11.4.1 Game List Example ................................................................................................ 141
11.5 Trigger Port Forwarding ...................................................................................................142
11.5.1 Trigger Port Forwarding Example ........................................................................... 142
11.5.2 Two Points To Remember About Trigger Ports ...................................................... 143
11.6 NAT Advanced Screen ..................................................................................................... 143
Chapter 12
Dynamic DNS ........................................................................................................................ 147
12.1 Dynamic DNS Introduction ............................................................................................. 147
12.1.1 DynDNS Wildcard .................................................................................................. 147
12.2 Dynamic DNS Screen .................................................................................................... 147
Part III: Security.................................................................................... 151
Chapter 13
Firewall...................................................................................................................................153
13.1 Introduction to ZyXEL’s Firewall .................................................................................... 153
13.1.1 What is a Firewall? ................................................................................................. 153
13.1.2 Stateful Inspection Firewall .................................................................................... 153
13.1.3 About the NBG420N Firewall ................................................................................. 153
13.1.4 Guidelines For Enhancing Security With Your Firewall .......................................... 154
13.2 Triangle Routes ............................................................................................................... 154
13.2.1 Triangle Routes and IP Alias .................................................................................. 154
13.3 General Firewall Screen ............................................................................................... 155
13.4 Services Screen ............................................................................................................. 156
13.4.1 The Add Firewall Rule Screen ............................................................................... 157
Chapter 14
Content Filtering ...................................................................................................................161
14.1 Introduction to Content Filtering ...................................................................................... 161
14.2 Restrict Web Features .....................................................................................................161
14.3 Days and Times ............................................................................................................... 161
14.4 Filter Screen .................................................................................................................... 161
14.5 Schedule .......................................................................................................................... 163
14.6 Customizing Keyword Blocking URL Checking ............................................................... 164
14.6.1 Domain Name or IP Address URL Checking ......................................................... 164
14.6.2 Full Path URL Checking ......................................................................................... 164
14.6.3 File Name URL Checking ....................................................................................... 164
Chapter 15
IPSec VPN.............................................................................................................................. 165
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Table of Contents
15.1 IPSec VPN Overview ....................................................................................................... 165
15.1.1 What You Can Do in the IPSec VPN Screens ........................................................ 165
15.1.2 What You Need To Know About IPSec VPN .......................................................... 166
15.1.3 IKE SA (IKE Phase 1) Overview ............................................................................ 166
15.1.4 IPSec SA (IKE Phase 2) Overview ...................................................................... 167
15.2 The General Screen ........................................................................................................167
15.2.1 VPN Rule Setup (Basic) ......................................................................................... 168
15.2.2 VPN Rule Setup (Advanced) .................................................................................. 173
15.2.3 VPN Rule Setup (Manual) ...................................................................................... 179
15.3 The SA Monitor Screen ................................................................................................... 183
15.4 VPN and Remote Management ....................................................................................... 184
15.5 IPSec VPN Technical Reference ..................................................................................... 185
Part IV: Management............................................................................ 193
Chapter 16
Static Route Screens............................................................................................................195
16.1 Static Route Overview .....................................................................................................195
16.2 IP Static Route Screen ....................................................................................................195
16.2.1 Static Route Setup Screen ................................................................................... 196
Chapter 17
Bandwidth Management.......................................................................................................199
17.1 Bandwidth Management Overview ................................................................................. 199
17.2 Application-based Bandwidth Management .................................................................... 199
17.3 Subnet-based Bandwidth Management .......................................................................... 199
17.4 Application and Subnet-based Bandwidth Management ................................................. 200
17.5 Bandwidth Management Priorities ................................................................................... 200
17.6 Predefined Bandwidth Management Services ................................................................. 201
17.6.1 Services and Port Numbers ................................................................................... 201
17.7 Default Bandwidth Management Classes and Priorities .................................................. 202
17.8 Bandwidth Management General Configuration ............................................................. 202
17.9 Bandwidth Management Advanced Configuration .......................................................... 203
17.9.1 Rule Configuration with the Pre-defined Service ................................................ 205
17.9.2 Rule Configuration: User Defined Service Rule Configuration ............................ 205
17.10 Bandwidth Management Monitor ................................................................................ 206
Chapter 18
Remote Management............................................................................................................ 209
18.1 Remote Management Overview ...................................................................................... 209
18.1.1 Remote Management Limitations .......................................................................... 209
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Table of Contents
18.1.2 Remote Management and NAT .............................................................................. 210
18.1.3 System Timeout .................................................................................................... 210
18.2 WWW Screen ............................................................................................................... 210
18.3 Telnet ................................................................................................................................211
18.4 Telnet Screen ....................................................................................................................211
18.5 FTP Screen ..................................................................................................................... 212
18.6 DNS Screen .................................................................................................................. 212
Chapter 19
Universal Plug-and-Play (UPnP).......................................................................................... 215
19.1 Introducing Universal Plug and Play ............................................................................... 215
19.1.1 How do I know if I'm using UPnP? ......................................................................... 215
19.1.2 NAT Traversal ........................................................................................................ 215
19.1.3 Cautions with UPnP ............................................................................................... 215
19.2 UPnP and ZyXEL ............................................................................................................216
19.3 UPnP Screen ................................................................................................................... 216
19.4 Installing UPnP in Windows Example .............................................................................. 217
Part V: Maintenance and Troubleshooting ........................................ 227
Chapter 20
System ...................................................................................................................................229
20.1 System Overview ............................................................................................................. 229
20.2 System General Screen ................................................................................................. 229
20.3 Time Setting Screen ........................................................................................................ 230
Chapter 21
Logs .......................................................................................................................................233
21.1 View Log ......................................................................................................................... 233
21.2 Log Settings ..................................................................................................................... 234
21.3 Log Descriptions .............................................................................................................. 237
Chapter 22
Tools.......................................................................................................................................251
22.1 Firmware Upload Screen ................................................................................................. 251
22.2 Configuration Screen ....................................................................................................... 252
22.2.1 Backup Configuration ............................................................................................. 253
22.2.2 Restore Configuration ............................................................................................ 253
22.2.3 Back to Factory Defaults ........................................................................................ 254
22.3 Restart Screen ................................................................................................................. 254
22.4 Wake On LAN .................................................................................................................. 255
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Table of Contents
Chapter 23
Configuration Mode..............................................................................................................257
Chapter 24
Sys Op Mode .........................................................................................................................259
24.1 Overview .......................................................................................................................... 259
24.1.1 Router .................................................................................................................... 259
24.1.2 AP .......................................................................................................................... 259
24.2 Selecting System Operation Mode .................................................................................. 260
Chapter 25
Language............................................................................................................................... 263
25.1 Language Screen ............................................................................................................ 263
Chapter 26
Troubleshooting....................................................................................................................265
26.1 Power, Hardware Connections, and LEDs ...................................................................... 265
26.2 NBG420N Access and Login ........................................................................................... 266
26.3 Internet Access ................................................................................................................ 268
26.4 Resetting the NBG420N to Its Factory Defaults .............................................................. 269
26.5 Wireless Router/AP Troubleshooting ............................................................................... 269
26.6 Advanced Features .........................................................................................................270
Part VI: Appendices and Index ........................................................... 271
Appendix A Product Specifications and Wall-Mounting Instructions .................................... 273
Appendix B Pop-up Windows, JavaScripts and Java Permissions ......................................279
Appendix C IP Addresses and Subnetting ...........................................................................285
Appendix D Setting up Your Computer’s IP Address ...........................................................293
26.6.1 Verifying Settings ................................................................................................... 308
Appendix E Wireless LANs ..................................................................................................309
26.6.2 WPA(2)-PSK Application Example ......................................................................... 318
26.6.3 WPA(2) with RADIUS Application Example ........................................................... 318
Appendix F Services ............................................................................................................ 321
Appendix G Legal Information ..............................................................................................325
Appendix H Customer Support............................................................................................. 329
Index.......................................................................................................................................335
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NBG420N User’s Guide
List of Figures
List of Figures
Figure 1 Secure Wireless Internet Access in Router Mode ................................................................... 31
Figure 2 Wireless Internet Access in AP Mode ..................................................................................... 32
Figure 3 Front Panel ............................................................................................................................... 33
Figure 4 Change Password Screen ........................................................................................................ 38
Figure 5 Selecting the setup mode ....................................................................................................... 39
Figure 6 Web Configurator Status Screen ............................................................................................. 40
Figure 7 Any IP Table ............................................................................................................................ 44
Figure 8 Summary: BW MGMT Monitor ................................................................................................. 45
Figure 9 Summary: DHCP Table ............................................................................................................ 45
Figure 10 Summary: Packet Statistics ................................................................................................... 46
Figure 11 Summary: VPN Monitor .......................................................................................................... 47
Figure 12 Summary: Wireless Association List ...................................................................................... 47
Figure 13 Select Wizard or Advanced Mode .......................................................................................... 49
Figure 14 Select a Language ................................................................................................................. 50
Figure 15 Welcome to the Connection Wizard ....................................................................................... 50
Figure 16 Wizard Step 1: System Information ........................................................................................ 51
Figure 17 Wizard Step 2: Wireless LAN ................................................................................................. 52
Figure 18 Wizard Step 2: Basic (WEP) Security ..................................................................................... 53
Figure 19 Wizard Step 2: Extend (WPA-PSK or WPA2-PSK) Security ................................................... 54
Figure 20 Wizard Step 3: ISP Parameters. ............................................................................................. 55
Figure 21 Wizard Step 3: Ethernet Connection ...................................................................................... 55
Figure 22 Wizard Step 3: PPPoE Connection ........................................................................................ 56
Figure 23 Wizard Step 3: PPTP Connection .......................................................................................... 57
Figure 24 Wizard Step 3: Your IP Address ............................................................................................. 58
Figure 25 Wizard Step 3: WAN IP and DNS Server Addresses ............................................................. 60
Figure 26 Wizard Step 3: WAN MAC Address ........................................................................................ 61
Figure 27 Wizard Step 4: Bandwidth Management ............................................................................... 62
Figure 28 Connection Wizard Save ....................................................................................................... 63
Figure 29 Connection Wizard Complete ................................................................................................. 63
Figure 30 Wireless Internet Access in AP Mode ................................................................................... 65
Figure 31 Maintenance > Sys OP Mode > General ................................................................................ 66
Figure 32 Status: AP Mode .................................................................................................................... 66
Figure 33 Menu: AP Mode ...................................................................................................................... 68
Figure 34 Network > LAN > IP ............................................................................................................. 70
Figure 35 Wireless AP Connection to the Internet ................................................................................. 73
Figure 36 Example WPS Process: PBC Method .................................................................................... 75
Figure 37 Example WPS Process: PIN Method ..................................................................................... 76
Figure 38 Network > Wireless LAN > General ....................................................................................... 77
NBG420N User’s Guide
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List of Figures
Figure 39 Status: AP Mode ..................................................................................................................... 78
Figure 40 Connecting a Wireless Client to a Wireless Network t ........................................................... 79
Figure 41 Security Settings ................................................................................................................... 79
Figure 42 Confirm Save .......................................................................................................................... 79
Figure 43 Link Status ............................................................................................................................. 80
Figure 44 Site-To-Site VPN Tunnel ......................................................................................................... 80
Figure 45 Property .................................................................................................................................. 81
Figure 46 Local Policy ............................................................................................................................ 81
Figure 47 Remote Policy ........................................................................................................................ 82
Figure 48 Authentication Method ............................................................................................................ 82
Figure 49 IPSec Algorithm ...................................................................................................................... 82
Figure 50 VPN Summary ........................................................................................................................ 83
Figure 51 Property .................................................................................................................................. 83
Figure 52 Local Policy ............................................................................................................................ 83
Figure 53 Remote Policy ........................................................................................................................ 83
Figure 54 Authentication Method ............................................................................................................ 84
Figure 55 IPSec Algorithm ...................................................................................................................... 84
Figure 56 VPN Summary ........................................................................................................................ 84
Figure 57 Pinging Jack’s Local IP Address ............................................................................................ 85
Figure 58 SA Monitor .............................................................................................................................. 85
Figure 59 Example of a Wireless Network ............................................................................................. 89
Figure 60 Roaming Example .................................................................................................................. 93
Figure 61 Network > Wireless LAN > General ...................................................................................... 95
Figure 62 Network > Wireless LAN > General: No Security ................................................................... 96
Figure 63 Network > Wireless LAN > General: Static WEP ................................................................... 97
Figure 64 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK .................................................. 98
Figure 65 Network > Wireless LAN > General: WPA/WPA2 ................................................................. 100
Figure 66 Network > Wireless LAN > MAC Filter ................................................................................. 102
Figure 67 Network > Wireless LAN > Advanced .................................................................................. 103
Figure 68 Network > Wireless LAN > QoS .......................................................................................... 104
Figure 69 Network > Wireless LAN > QoS: Application Priority Configuration ..................................... 105
Figure 70 WPS ..................................................................................................................................... 106
Figure 71 WPS Station ......................................................................................................................... 107
Figure 72 Scheduling ............................................................................................................................ 108
Figure 73 Login Screen ........................................................................................................................ 109
Figure 74 System Status screen ............................................................................................................111
Figure 75 WPS In Progress ...................................................................................................................113
Figure 76 Port Forwarding .....................................................................................................................114
Figure 77 Login Screen .........................................................................................................................115
Figure 78 Network > WAN > Internet Connection: Ethernet Encapsulation ..........................................118
Figure 79 Network > WAN > Internet Connection: PPPoE Encapsulation ........................................... 120
Figure 80 Network > WAN > Internet Connection: PPTP Encapsulation ............................................. 123
Figure 81 Network > WAN > Advanced ............................................................................................... 125
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NBG420N User’s Guide
List of Figures
Figure 82 Any IP Example .................................................................................................................... 129
Figure 83 Network > LAN > IP ............................................................................................................. 130
Figure 84 Network > LAN > IP Alias .................................................................................................... 131
Figure 85 Network > LAN > Advanced .............................................................................................. 131
Figure 86 Network > DHCP > General .............................................................................................. 133
Figure 87 Network > DHCP > Advanced ............................................................................................. 134
Figure 88 Network > DHCP > Client List ............................................................................................. 136
Figure 89 Multiple Servers Behind NAT Example ................................................................................ 138
Figure 90 Network > NAT > General ................................................................................................... 138
Figure 91 Network > NAT > Application .............................................................................................. 140
Figure 92 Game List Example .............................................................................................................. 142
Figure 93 Trigger Port Forwarding Process: Example .......................................................................... 143
Figure 94 Network > NAT > Advanced ................................................................................................ 144
Figure 95 Dynamic DNS ....................................................................................................................... 148
Figure 96 Using IP Alias to Solve the Triangle Route Problem ............................................................ 155
Figure 97 Security > Firewall > General l ............................................................................................. 155
Figure 98 Security > Firewall > Services ............................................................................................. 156
Figure 99 Security > Firewall > Services > Adding a Rule .................................................................. 158
Figure 100 Security > Content Filter > Filter ........................................................................................ 162
Figure 101 Security > Content Filter > Schedule .................................................................................. 163
Figure 102 IPSec VPN: Overview ........................................................................................................ 165
Figure 103 VPN: IKE SA and IPSec SA .............................................................................................. 166
Figure 104 Security > VPN > General .................................................................................................. 167
Figure 105 IPSec Fields Summary ..................................................................................................... 169
Figure 106 Security > VPN > General > Rule Setup: IKE (Basic) ........................................................ 169
Figure 107 Security > VPN > General > Rule Setup: IKE (Advanced) ................................................. 174
Figure 108 Security > VPN > General > Rule Setup: Manual .............................................................. 180
Figure 109 Security > VPN > SA Monitor ............................................................................................. 183
Figure 110 VPN for Remote Management Example ............................................................................ 184
Figure 111 IKE SA: Main Negotiation Mode, Steps 1 - 2: IKE SA Proposal ......................................... 185
Figure 112 IKE SA: Main Negotiation Mode, Steps 3 - 4: DH Key Exchange ....................................... 185
Figure 113 IKE SA: Main Negotiation Mode, Steps 5 - 6: Authentication ............................................. 186
Figure 114 VPN/NAT Example ............................................................................................................. 188
Figure 115 VPN: Transport and Tunnel Mode Encapsulation ............................................................... 189
Figure 116 Private DNS Server Example ............................................................................................. 191
Figure 117 Example of Static Routing Topology ................................................................................... 195
Figure 118 Management > Static Route > IP Static Route ................................................................... 196
Figure 119 Management > Static Route > IP Static Route: Static Route Setup .................................... 197
Figure 120 Subnet-based Bandwidth Management Example .............................................................. 200
Figure 121 Management > Bandwidth MGMT > General .................................................................. 202
Figure 122 Management > Bandwidth MGMT > Advanced ................................................................ 203
Figure 123 Bandwidth Management Rule Configuration: Pre-defined Service .................................... 205
Figure 124 Management > Bandwidth MGMT > Advanced: User-defined Service Rule Configuration 206
NBG420N User’s Guide
21
List of Figures
Figure 125 Management > Bandwidth MGMT > Monitor .................................................................... 207
Figure 126 Management > Remote MGMT > WWW .......................................................................... 210
Figure 127 Management > Remote MGMT > Telnet ............................................................................211
Figure 128 Management > Remote MGMT > FTP .............................................................................. 212
Figure 129 Management > Remote MGMT > DNS ............................................................................. 213
Figure 130 Management > UPnP > General ....................................................................................... 216
Figure 131 Add/Remove Programs: Windows Setup: Communication ................................................ 217
Figure 132 Add/Remove Programs: Windows Setup: Communication: Components .......................... 218
Figure 133 Network Connections ......................................................................................................... 218
Figure 134 Windows Optional Networking Components Wizard .......................................................... 219
Figure 135 Networking Services ........................................................................................................... 219
Figure 136 Network Connections ......................................................................................................... 220
Figure 137 Internet Connection Properties .......................................................................................... 221
Figure 138 Internet Connection Properties: Advanced Settings ........................................................... 222
Figure 139 Internet Connection Properties: Advanced Settings: Add .................................................. 222
Figure 140 System Tray Icon ................................................................................................................ 223
Figure 141 Internet Connection Status ................................................................................................. 223
Figure 142 Network Connections ......................................................................................................... 224
Figure 143 Network Connections: My Network Places ........................................................................ 225
Figure 144 Network Connections: My Network Places: Properties: Example ...................................... 225
Figure 145 Maintenance > System > General .....................................................................................229
Figure 146 Maintenance > System > Time Setting .............................................................................. 230
Figure 147 Maintenance > Logs > View Log ....................................................................................... 233
Figure 148 Maintenance > Logs > Log Settings ..................................................................................235
Figure 149 Maintenance > Tools > Firmware ...................................................................................... 251
Figure 150 Upload Warning .................................................................................................................. 252
Figure 151 Network Temporarily Disconnected ....................................................................................252
Figure 152 Upload Error Message ....................................................................................................... 252
Figure 153 Maintenance > Tools > Configuration ................................................................................253
Figure 154 Configuration Restore Successful ...................................................................................... 254
Figure 155 Temporarily Disconnected .................................................................................................. 254
Figure 156 Configuration Restore Error ............................................................................................... 254
Figure 157 Maintenance > Tools > Restart .......................................................................................... 255
Figure 158 Maintenance > Tools > Wake On LAN .............................................................................. 255
Figure 159 Maintenance > Config Mode > General ............................................................................ 257
Figure 160 LAN and WAN IP Addresses in Router Mode .................................................................... 259
Figure 161 IP Address in AP Mode ...................................................................................................... 260
Figure 162 Maintenance > Sys OP Mode > General ........................................................................... 260
Figure 163 Maintenance > Sys Op Mode > General: Router ............................................................... 260
Figure 164 Maintenance > Sys Op Mode > General: AP ..................................................................... 261
Figure 165 Language ........................................................................................................................... 263
Figure 166 Wall-mounting Example ...................................................................................................... 277
Figure 167 Masonry Plug and M4 Tap Screw .......................................................................................278
22
NBG420N User’s Guide
List of Figures
Figure 168 Pop-up Blocker ................................................................................................................... 279
Figure 169 Internet Options: Privacy .................................................................................................... 280
Figure 170 Internet Options: Privacy .................................................................................................... 281
Figure 171 Pop-up Blocker Settings ..................................................................................................... 281
Figure 172 Internet Options: Security ................................................................................................... 282
Figure 173 Security Settings - Java Scripting ....................................................................................... 283
Figure 174 Security Settings - Java ...................................................................................................... 283
Figure 175 Java (Sun) .......................................................................................................................... 284
Figure 176 Network Number and Host ID ............................................................................................ 286
Figure 177 Subnetting Example: Before Subnetting ............................................................................ 288
Figure 178 Subnetting Example: After Subnetting ............................................................................... 289
Figure 179 WIndows 95/98/Me: Network: Configuration ...................................................................... 294
Figure 180 Windows 95/98/Me: TCP/IP Properties: IP Address .......................................................... 295
Figure 181 Windows 95/98/Me: TCP/IP Properties: DNS Configuration .............................................. 296
Figure 182 Windows XP: Start Menu .................................................................................................... 297
Figure 183 Windows XP: Control Panel ............................................................................................... 297
Figure 184 Windows XP: Control Panel: Network Connections: Properties ......................................... 298
Figure 185 Windows XP: Local Area Connection Properties ............................................................... 298
Figure 186 Windows XP: Internet Protocol (TCP/IP) Properties .......................................................... 299
Figure 187 Windows XP: Advanced TCP/IP Properties ....................................................................... 300
Figure 188 Windows XP: Internet Protocol (TCP/IP) Properties .......................................................... 301
Figure 189 Macintosh OS 8/9: Apple Menu .......................................................................................... 302
Figure 190 Macintosh OS 8/9: TCP/IP ................................................................................................. 302
Figure 191 Macintosh OS X: Apple Menu ............................................................................................ 303
Figure 192 Macintosh OS X: Network .................................................................................................. 304
Figure 193 Red Hat 9.0: KDE: Network Configuration: Devices ......................................................... 305
Figure 194 Red Hat 9.0: KDE: Ethernet Device: General ................................................................... 306
Figure 195 Red Hat 9.0: KDE: Network Configuration: DNS ............................................................... 306
Figure 196 Red Hat 9.0: KDE: Network Configuration: Activate ......................................................... 307
Figure 197 Red Hat 9.0: Dynamic IP Address Setting in ifconfig-eth0 ................................................ 307
Figure 198 Red Hat 9.0: Static IP Address Setting in ifconfig-eth0 ................................................... 307
Figure 199 Red Hat 9.0: DNS Settings in resolv.conf ........................................................................ 308
Figure 200 Red Hat 9.0: Restart Ethernet Card .................................................................................. 308
Figure 201 Red Hat 9.0: Checking TCP/IP Properties ........................................................................ 308
Figure 202 Peer-to-Peer Communication in an Ad-hoc Network ......................................................... 309
Figure 203 Basic Service Set ............................................................................................................... 310
Figure 204 Infrastructure WLAN ............................................................................................................311
Figure 205 RTS/CTS ........................................................................................................................... 312
Figure 206 WPA(2)-PSK Authentication ............................................................................................... 318
NBG420N User’s Guide
23
List of Figures
24
NBG420N User’s Guide
List of Tables
List of Tables
Table 1 Features Available in Router Mode vs. AP Mode ..................................................................... 32
Table 2 Front Panel LEDs ...................................................................................................................... 33
Table 3 Status Screen Icon Key ............................................................................................................. 40
Table 4 Web Configurator Status Screen ........................................................................................... 40
Table 5 Screens Summary .................................................................................................................... 42
Table 6 Summary: DHCP Table ............................................................................................................. 45
Table 7 Summary: Packet Statistics ...................................................................................................... 46
Table 8 Summary: Wireless Association List ......................................................................................... 47
Table 9 Summary: Wireless Association List ......................................................................................... 48
Table 10 Wizard Step 1: System Information ......................................................................................... 51
Table 11 Wizard Step 2: Wireless LAN .................................................................................................. 52
Table 12 Wizard Step 2: Basic (WEP) Security ..................................................................................... 53
Table 13 Wizard Step 2: Extend (WPA-PSK or WPA2-PSK) Security ................................................... 54
Table 14 Wizard Step 3: ISP Parameters .............................................................................................. 55
Table 15 Wizard Step 3: PPPoE Connection ......................................................................................... 56
Table 16 Wizard Step 3: PPTP Connection ........................................................................................... 57
Table 17 Wizard Step 3: Your IP Address .............................................................................................. 58
Table 18 Private IP Address Ranges ..................................................................................................... 58
Table 19 Wizard Step 3: WAN IP and DNS Server Addresses .............................................................. 60
Table 20 Example of Network Properties for LAN Servers with Fixed IP Addresses ............................ 61
Table 21 Wizard Step 3: WAN MAC Address ........................................................................................ 61
Table 22 Wizard Step 4: Bandwidth Management ................................................................................. 62
Table 23 Web Configurator Status Screen ........................................................................................... 67
Table 24 Screens Summary .................................................................................................................. 68
Table 25 Network > LAN > IP ............................................................................................................... 70
Table 26 Site-To-Site VPN Tunnel Settings ........................................................................................... 80
Table 27 Types of Encryption for Each Type of Authentication ............................................................. 91
Table 28 WMM QoS Priorities ............................................................................................................... 94
Table 29 Network > Wireless LAN > General ........................................................................................ 95
Table 30 Wireless No Security ............................................................................................................... 96
Table 31 Network > Wireless LAN > General: Static WEP .................................................................... 97
Table 32 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK .................................................. 99
Table 33 Network > Wireless LAN > General: WPA/WPA2 ................................................................. 100
Table 34 Network > Wireless LAN > MAC Filter ..................................................................................102
Table 35 Network > Wireless LAN > Advanced ................................................................................... 103
Table 36 Network > Wireless LAN > QoS ............................................................................................ 104
Table 37 WPS ...................................................................................................................................... 106
Table 38 WPS Station .......................................................................................................................... 107
NBG420N User’s Guide
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List of Tables
Table 39 Scheduling ............................................................................................................................ 108
Table 40 Login Screen ......................................................................................................................... 109
Table 41 System Status screen ............................................................................................................111
Table 42 Port Forwarding .....................................................................................................................114
Table 43 Network > WAN > Internet Connection: Ethernet Encapsulation ...........................................119
Table 44 Network > WAN > Internet Connection: PPPoE Encapsulation ............................................ 121
Table 45 Network > WAN > Internet Connection: PPTP Encapsulation .............................................. 123
Table 46 WAN > Advanced .................................................................................................................. 125
Table 47 Network > LAN > IP .............................................................................................................. 130
Table 48 Network > LAN > IP Alias ..................................................................................................... 131
Table 49 Network > LAN > Advanced .................................................................................................. 132
Table 50 Network > DHCP > General .................................................................................................. 133
Table 51 Network > DHCP > Advanced .............................................................................................. 134
Table 52 Network > DHCP > Client List ............................................................................................... 136
Table 53 Network > NAT > General ..................................................................................................... 139
Table 54 NAT Application .................................................................................................................... 140
Table 55 Network > NAT > Advanced .................................................................................................. 144
Table 56 Dynamic DNS ....................................................................................................................... 148
Table 57 Security > Firewall > General ................................................................................................ 155
Table 58 Security > Firewall > Services ............................................................................................... 156
Table 59 Security > Firewall > Services > Adding a Rule .................................................................... 158
Table 60 Security > Content Filter > Filter ........................................................................................... 162
Table 61 Security > Content Filter > Schedule .................................................................................... 163
Table 62 Security > VPN > General ..................................................................................................... 168
Table 63 SECURITY > VPN > Rule Setup: IKE (Basic) ...................................................................... 170
Table 64 Security > VPN > Rule Setup: IKE (Advanced) .................................................................... 175
Table 65 Security > VPN > Rule Setup: Manual ..................................................................................180
Table 66 Security > VPN > SA Monitor ................................................................................................ 184
Table 67 VPN Example: Matching ID Type and Content ..................................................................... 186
Table 68 VPN Example: Mismatching ID Type and Content ............................................................... 187
Table 69 Management > Static Route > IP Static Route ...................................................................... 196
Table 70 Management > Static Route > IP Static Route: Static Route Setup ...................................... 197
Table 71 Application and Subnet-based Bandwidth Management Example ....................................... 200
Table 72 Bandwidth Management Priorities ........................................................................................ 200
Table 73 Media Bandwidth Management Setup: Services .................................................................. 201
Table 74 Bandwidth Management Priority with Default Classes ......................................................... 202
Table 75 Management > Bandwidth MGMT > General ....................................................................... 203
Table 76 Management > Bandwidth MGMT > Advanced .................................................................... 204
Table 77 Bandwidth Management Rule Configuration: Pre-defined Service ....................................... 205
Table 78 Management > Bandwidth MGMT > Advanced: User-defined Service Rule Configuration . 206
Table 79 Management > Remote MGMT > WWW .............................................................................. 210
Table 80 Management > Remote MGMT > Telnet ................................................................................211
Table 81 Management > Remote MGMT > FTP ................................................................................. 212
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NBG420N User’s Guide
List of Tables
Table 82 Management > Remote MGMT > DNS ................................................................................. 213
Table 83 Management > UPnP > General ........................................................................................... 216
Table 84 Maintenance > System > General ........................................................................................ 229
Table 85 Maintenance > System > Time Setting ................................................................................. 231
Table 86 Maintenance > Logs > View Log ........................................................................................... 234
Table 87 Maintenance > Logs > Log Settings ..................................................................................... 235
Table 88 System Maintenance Logs .................................................................................................... 237
Table 89 System Error Logs ................................................................................................................ 238
Table 90 Access Control Logs ............................................................................................................. 238
Table 91 TCP Reset Logs .................................................................................................................... 238
Table 92 Packet Filter Logs ................................................................................................................. 239
Table 93 ICMP Logs ............................................................................................................................ 239
Table 94 CDR Logs ............................................................................................................................. 240
Table 95 PPP Logs .............................................................................................................................. 240
Table 96 UPnP Logs ............................................................................................................................ 240
Table 97 Content Filtering Logs ........................................................................................................... 240
Table 98 Attack Logs ........................................................................................................................... 241
Table 99 IPSec Logs ............................................................................................................................ 242
Table 100 IKE Logs ............................................................................................................................. 242
Table 101 PKI Logs ............................................................................................................................. 245
Table 102 802.1X Logs ........................................................................................................................ 246
Table 103 ACL Setting Notes .............................................................................................................. 247
Table 104 ICMP Notes ......................................................................................................................... 247
Table 105 Syslog Logs ........................................................................................................................ 248
Table 106 RFC-2408 ISAKMP Payload Types .................................................................................... 249
Table 107 Maintenance > Tools > Firmware ........................................................................................ 251
Table 108 Maintenance Restore Configuration ...................................................................................253
Table 109 Maintenance > Tools > Wake On LAN ................................................................................ 255
Table 110 Maintenance > Config Mode > General ............................................................................. 257
Table 111 Advanced Configuration Options ........................................................................................ 258
Table 112 Maintenance > Sys OP Mode > General ........................................................................... 261
Table 113 Hardware Features ............................................................................................................. 273
Table 114 Firmware Features .............................................................................................................. 274
Table 115 Feature Specifications ......................................................................................................... 275
Table 116 Standards Supported .......................................................................................................... 276
Table 117 Subnet Mask - Identifying Network Number ........................................................................ 286
Table 118 Subnet Masks ..................................................................................................................... 287
Table 119 Maximum Host Numbers ..................................................................................................... 287
Table 120 Alternative Subnet Mask Notation ....................................................................................... 287
Table 121 Subnet 1 .............................................................................................................................. 289
Table 122 Subnet 2 .............................................................................................................................. 290
Table 123 Subnet 3 .............................................................................................................................. 290
Table 124 Subnet 4 .............................................................................................................................. 290
NBG420N User’s Guide
27
List of Tables
Table 125 Eight Subnets ...................................................................................................................... 290
Table 126 24-bit Network Number Subnet Planning ............................................................................ 291
Table 127 16-bit Network Number Subnet Planning ............................................................................ 291
Table 128 IEEE 802.11g ...................................................................................................................... 313
Table 129 Comparison of EAP Authentication Types .......................................................................... 316
Table 130 Wireless Security Relational Matrix .................................................................................... 319
Table 131 Examples of Services ......................................................................................................... 321
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NBG420N User’s Guide
PART I
Introduction
Getting to Know Your NBG420N (31)
The WPS Button (35)
Introducing the Web Configurator (37)
Connection Wizard (49)
AP Mode (65)
Tutorials (73)
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